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20120901
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and in the united states, particularly at duke university where they had a big hyperbaric facility and they were back in chambers. there were still some government funding and they're still trying to figure out how long could a diver stay down, how deep could a diver go. and it turned out, and i described, i sort of follow that question in the book because as i said it seemed like isn't this something we know, how high amount everest is and what the deepest sound is? it seems like it's a given, it's not. but what you find is because gas has become more dense and significant doubts under greater pressure, it does feel in the divers describe the sensation like they're breeding a liquid almost. that is so thick that they have to mouse brief very deliberately to get the gases in and out and so that makes me uncomfortable because when you are eating your not really breathing. and so that was kind of the issues that came up against, when they get to depths, let's say beyond 1500 feet, over some experiments over 2000 feet of depth. and in a commercial oilfield now, i think 1000-foot dives are still, th
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